Universal speaker mounting device



FIG. 1 is a left side perspective view of a universal speaker mounting device, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a left side perspective view thereof, having its rotatable mounting platform in a horizontal position; and,

FIG. 9 is a left side perspective view thereof, having its rotatable mounting platform in a vertical position. 

The ornamental design for a universal speaker mounting device, as shown and described. 